We study the evolution of the FEL radiation intensity and spectrum starting from noise in the electron beam longitudinal distribution. Due to the slippage both the time and frequency structure of the emitted radiation pulse show a very different behavior when the bunch length is much longer than or of the order of the cooperation length lc. The occurrence of superradiant spikes is discussed. We present analytical and numerical results.
A study of linewidth, noise and fluctuations in a FEL operating in SASE / R. Bonifacio, L. De Salvo, P. Pierini, N. Piovella, C. Pellegrini. - In: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH. SECTION A, ACCELERATORS, SPECTROMETERS, DETECTORS AND ASSOCIATED EQUIPMENT. - ISSN 0168-9002. - 341:1-3(1994), pp. 181-185.
A study of linewidth, noise and fluctuations in a FEL operating in SASE
R. Bonifacio;N. Piovella;
1994
Abstract
We study the evolution of the FEL radiation intensity and spectrum starting from noise in the electron beam longitudinal distribution. Due to the slippage both the time and frequency structure of the emitted radiation pulse show a very different behavior when the bunch length is much longer than or of the order of the cooperation length lc. The occurrence of superradiant spikes is discussed. We present analytical and numerical results.
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